Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9be538b7ad9cea…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 11:39:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e6aa7aaeaba72a58fabf2e6356a27a73 SHA-1: ed15cb4117be6e1d1e6016f671c4c0bca68601e9 SHA-256: 3d9be538b7ad9cea986199f4d25b6b4adc271b1558305d9f2c2ed3dea0b09334
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body, though partially garbled, contains references to 'Robux No Verification' and a URL matching the malicious redirector. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/robux-no-verification-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F7 27860 bytes
SHA-256: a78fa6cf137a215a6c8f17d8868a7bda898059903225cd88c69ddeb43b723270
font_01_sfnt_off0000915e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915E 18436 bytes
SHA-256: 7bd58a32436a1cd7e6b960dae53a6923ed98c563d453e9d292140b8243cceb65

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